Clamping key connection piston structure

Abstract

The utility model discloses a clamping key connection piston structure which comprises an oil cylinder piston rod, a piston installation mechanism and a locking nut, an external thread head is arranged at the end of the oil cylinder piston rod, and the piston installation mechanism comprises a clamping key clamped into the periphery of the oil cylinder piston rod, a clamping cap pressed on the periphery of the clamping key and an air piston pressed on the periphery of the clamping cap. According to the utility model, the external thread head is convenient to match with the locking nut, the clamping cap is matched with the clamping key to press the air piston on the oil cylinder piston rod, the assembly is simple, the matching degree is high, the locking nut plays a role in limiting, the clamping cap is prevented from falling off, a screw can be additionally arranged in the positioning hole, and the stability of the locking nut is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of piston structures, in particular to a key-connected piston structure. Background Art

[0002] Currently, hydraulic cylinders are widely used in a variety of fields, including machine tools and construction machinery. The piston rod, a crucial component in a hydraulic cylinder, is typically manufactured as a single piece. However, when the diameters of the piston and rod differ significantly, manufacturing costs require the piston and rod to be separated and then fixed together during use.

[0003] Currently, the piston and the piston rod are usually fixed with a single thread. However, this fixing method may cause the thread to loosen during use. Therefore, a split-structure piston rod that can firmly fix the piston and the piston rod is highly desired. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and in the abstract and title of the utility model to avoid obscuring the purpose of this section, the abstract and the title of the utility model, and such simplifications or omissions shall not be used to limit the scope of the present invention.

[0005] In view of the above-mentioned problems and / or problems existing in the use of the key-connected piston structure, the present utility model is proposed.

[0006] Therefore, the purpose of the present invention is to provide a key-connected piston structure, which is easy to cooperate with the locking nut through the external thread head, and the gas piston is pressed onto the cylinder piston rod through the card cap and the key. The assembly is simple and the fit is high. The locking nut plays a limiting role to prevent the card cap from falling off, and the positioning hole can be equipped with screws to further improve the stability of the locking nut.

[0007] In order to solve the above technical problems, according to one aspect of the present invention, the present invention provides the following technical solutions:

[0008] A key-connected piston structure, comprising:

[0009] An oil cylinder piston rod, wherein the end of the oil cylinder piston rod is provided with an external thread head;

[0010] A piston mounting mechanism, comprising a key clamped into the outer periphery of the oil cylinder piston rod, a cap pressed against the outer periphery of the key, and an air piston pressed against the outer periphery of the cap;

[0011] A locking nut is engaged with the external thread head.

[0012] As a preferred solution of the key-connected piston structure described in the present invention, a connecting head is provided at the middle of the oil cylinder piston rod, and a threaded hole is provided at the end of the oil cylinder piston rod.

[0013] As a preferred solution of the key-connected piston structure described in the present invention, the gas piston presses the outer periphery of the oil cylinder piston rod, and an O-ring is provided between the oil cylinder piston rod and the gas piston.

[0014] As a preferred solution of the key-connected piston structure described in the present invention, the key is composed of a circumference combination of three arc-shaped parts, and the locking nut presses the cap tightly.

[0015] As a preferred solution of the key-connected piston structure described in the present invention, the edge of the locking nut is set to an oblique angle, and the side wall of the locking nut is provided with a positioning hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects: this type of key-connected piston structure is easy to cooperate with the locking nut through the external thread head, and the gas piston is pressed onto the cylinder piston rod through the card cap and the key. The assembly is simple and the fit is high. The locking nut plays a limiting role to prevent the card cap from falling off, and the positioning hole can be equipped with screws to further improve the stability of the locking nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive labor. Among them:

[0018] Figure 1 This is a schematic diagram of the overall structure of a key-connected piston structure of the utility model;

[0019] Figure 2 This is a schematic cross-sectional view of a key-connected piston structure of the utility model;

[0020] Figure 3 This utility model is a key-connected piston structure Figure 2 Schematic diagram of the structure of part a.

[0021] 100, cylinder piston rod; 101, O-ring; 102, threaded hole; 110, connector; 200, piston mounting mechanism; 210, key; 220, cap; 230, air piston; 300, locking nut; 310, positioning hole. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0023] Secondly, the present invention is described in detail with reference to schematic diagrams. For ease of illustration, when describing the embodiments of the present invention, cross-sectional views of device structures may be partially enlarged to scale. Furthermore, the schematic diagrams are merely illustrative and should not limit the scope of protection of the present invention. Furthermore, in actual production, the three-dimensional dimensions of length, width, and depth should be included.

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

[0025] The utility model provides a piston structure with a key connection, which is easy to cooperate with the locking nut through the external thread head, and the gas piston is pressed onto the piston rod of the oil cylinder through the clamping cap and the key. The assembly is simple and the fit is high. The locking nut plays a limiting role to prevent the clamping cap from falling off, and a screw can be installed in the positioning hole to further improve the stability of the locking nut.

[0026] Figure 1-Figure 3 The following is a schematic diagram of a key-connected piston structure according to the present invention. Figure 1-Figure 3 In this embodiment, a key-connected piston structure is provided, and its main body includes a cylinder piston rod 100, a piston mounting mechanism 200 and a locking nut 300.

[0027] The oil cylinder piston rod 100 is conveniently matched with the lock nut 300 through an external thread head. Specifically, the end of the oil cylinder piston rod 100 is provided with an external thread head. In this embodiment, a connecting head 110 is provided in the middle of the oil cylinder piston rod 100, and a threaded hole 102 is provided at the end of the oil cylinder piston rod 100.

[0028] The piston mounting mechanism 200 presses the gas piston 230 onto the oil cylinder piston rod 100 through the clamping cap 220 and the clamping key 210. The assembly is simple and the degree of fit is high. Specifically, the piston mounting mechanism 200 includes a clamping key 210 clamped into the outer periphery of the oil cylinder piston rod 100, a clamping cap 220 pressed on the outer periphery of the clamping key 210, and a gas piston 230 pressed on the outer periphery of the clamping cap 220. In this embodiment, the gas piston 230 presses the outer periphery of the oil cylinder piston rod 100. An O-ring 101 is provided between the oil cylinder piston rod 100 and the gas piston 230. The clamping key 210 is composed of a circumference combination of three arc-shaped parts. The locking nut 300 presses the clamping cap 220.

[0029] The locking nut 300 plays a limiting role to prevent the cap 220 from falling off. The positioning hole 310 can be equipped with a screw to further improve the stability of the locking nut 300. Specifically, the locking nut 300 cooperates with the external thread head. In this embodiment, the edge of the locking nut 300 is set to an oblique angle, and the side wall of the locking nut 300 is provided with a positioning hole 310.

[0030] Combine Figure 1-Figure 3 The present embodiment is a key-connected piston structure, and the specific usage process is as follows: the external thread head is convenient for matching with the locking nut 300, and the gas piston 230 is pressed onto the cylinder piston rod 100 through the clamping cap 220 and the clamping key 210. The assembly is simple and the fit is high. The locking nut 300 plays a limiting role to prevent the clamping cap 220 from falling off, and the positioning hole 310 can be equipped with a screw to further improve the stability of the locking nut 300.

[0031] While the present invention has been described above with reference to specific embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, as long as no structural conflicts exist, the various features of the embodiments disclosed herein may be combined with one another in any manner, and the omission of an exhaustive description of these combinations in this specification is solely for the sake of space and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A key-connected piston structure, characterized in that: include: An oil cylinder piston rod (100), wherein the end of the oil cylinder piston rod (100) is provided with an external thread head; A piston mounting mechanism (200) includes a clamping key (210) clamped into the outer periphery of the oil cylinder piston rod (100), a clamping cap (220) pressed against the outer periphery of the clamping key (210), and a gas piston (230) pressed against the outer periphery of the clamping cap (220); A locking nut (300) is matched with the external thread head.

2. A key-connected piston structure according to claim 1, characterized in that: A connecting head (110) is provided at the middle of the oil cylinder piston rod (100), and a threaded hole (102) is provided at the end of the oil cylinder piston rod (100).

3. The key-connected piston structure according to claim 2, characterized in that: The gas piston (230) presses the outer periphery of the oil cylinder piston rod (100), and an O-ring (101) is provided between the oil cylinder piston rod (100) and the gas piston (230).

4. A key-connected piston structure according to claim 3, characterized in that: The clamping key (210) is composed of three arc-shaped parts assembled in a circle, and the locking nut (300) presses the clamping cap (220) tightly.

5. The key-connected piston structure according to claim 4, characterized in that: The edge of the locking nut (300) is set at an oblique angle, and the side wall of the locking nut (300) is provided with a positioning hole (310).

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